Marcia Brady never would have dated Michael Jackson, traded sex for drugs or partied at the Playboy mansion, but Maureen McCormick, who played the eldest daughter on the '70s sitcom "The Brady Bunch," did all of the above -- and more.

Salacious details abound in McCormick's new memoir, Here's the Story: Surviving Marcia Brady and Finding My True Voice (HarperCollins, 277 pages, $25.95). It makes Barry Williams' Growing Up Brady, where he recalled his pot smoking and girl chasing, look like Disneyland adventures.

McCormick nearly hit bottom with her drug abuse on the set of "The Brady Brides" in the early '80s, when in a quest for cocaine she ended up naked in front of the video camera of a guy she met at the Playboy mansion. The "Brady" producers didn't send her to rehab, but hooked her up with "shrink to the stars" Eugene Landy, who later was taken down over his negligent treatment of Beach Boy Brian Wilson. It would be a few more years before she found God, got clean, met her husband of more than 20 years, had a child and became happy again.

McCormick, 52, recalls these fun "Brady" facts:

• • She was awed by Florence Henderson's "terrific" figure and frequently witnessed her nude sunbathing. ("She had great boobs, too. And they were real!")

• • She fantasized about her TV dad Robert Reed and was the last to find out he was gay.

• • Co-star Eve Plumb was known to prance around naked in the dressing room they shared.

• • McCormick and Plumb "rebelled" in the final season by taping the show without bras.